202 FRIB Graduate Brochure

Georg Bollen
University Distinguished Professor of Physics,
FRIB Experimental Systems Division Director
Keywords: Nuclear Structure, Fundamental Symmetries, Nuclear Astrophysics,
Fragment Separator Beam Stopping
Experimental Nuclear Physics
About
• MS, Physics, Mainz University, 1984
• PhD, Physics, Mainz University, 1989
• Joined the laboratory in June 2000
• bollen@frib.msu.edu
Research
My research interests are related to nuclear and atomic
physics with focus on the study of basic properties of
atomic nuclei very far away from the valley of stability. A
major activity in my group is the determination of the mass
of such rare isotopes, which is their most fundamental
property. An accurate knowledge of atomic masses is
important for revealing the inner structure of exotic nuclei
and to provide crucial tests for nuclear model predictions.
Atomic masses are one of the key information required
for the description of the synthesis of the elements in the
universe. An additionalresearch interest is the development
of new techniques related to manipulation of low energy
beams.
research opportunities including interesting technical
developments aiming at reaching more exotic nuclei to
Additional research opportunities are in the related area
of beam physics at low energy.
Selected Publications
High-precision mass measurements of the isomeric and
ground states of 44 V: Improving constraints on the isobaric
multiplet mass equation parameters of the A=44, 0 +
quintet, D. Puentes, et al., Phys. Rev. C 101 (2020) 064309
High Precision Determination of the β Decay QEC Value of
C-11 and Implications on the Tests of the Standard Model,
K. Gulyuz, et al., Phys. Rev. Lett. 116 (2016) 012501
High-Precision Mass Measurement of
56
Cu and the
Redirection of the rp-Process Flow. A. A. Valverde, et al.,
Phys. Rev. Lett. 120 (2018) 032701
Biography
Grown up in Ramstein in Germany, I first attended the
University of Kaiserslautern for undergraduate studies
and completed my graduate studies at the Johannes-
Gutenberg University in Mainz. My PhD work pioneered
high precision mass measurements of radioactive isotopes
using ion trapping techniques at the ISOLDE Facility at
CERN. I worked for more than 8 years at CERN, including
4 years as ISOLDE Physics group leader. I came to MSU as
full professor in 2000.
How Students can Contribute as Part
of my Research Team
The LEBIT ion trap: Shown are the gold-plated highprecision
electrodes that provide the electric fields
needed for capturing and storing rare isotope ions in the
9.4 T field of the LEBIT Penning trap mass spectrometer.
Students of the LEBIT research team led by Dr. Ryan
Ringle and me will be in the unique position to perform
research at the interface of atomic and nuclear physics.
Not relying only on the availability of radioactive beam
LEBIT provides year-round hands-on training and
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